[Python知识库]2021-08-11 python多线程

import threading

def task1():
print(“线程1”)

def task2():
print(“线程2”)

def main():
# threading.Thread创建线程
thread1 = threading.Thread(target=task2)
# 启动线程
thread1.start()
thread2 = threading.Thread(target=task1)
thread2.start()
print(“线程3”)
if name == ‘main’:
main()

import threading
import time

def task1():
time.sleep(5)

def main():
start_time = time.time()
# threading.Thread创建线程
thread1 = threading.Thread(target=task1)
# 启动线程
thread1.start()
thread2 = threading.Thread(target=task1)
thread2.start()
# 让其他线程等待自己执行完成thread1.join()
thread1.join()
thread2.join()
end_time=time.time()

print(end_time-start_time)

if name == ‘main’:
main()